To control other display parameters (for example, layer, color, line font, or Curve Analysis Display), use Edit→ Object Display. The Complete listing option adds the continuity and coordinates of each knot point, the weight and coordinates of each pole, and additional information (which may include the coordinates, weight, curvature, tolerance, and/or the number of segments) for each defining point.Īnalysis→Curve allows you more control of some of the Curve Analysis Display parameters, such as the number of teeth, their maximum length, and their minimum or maximum values in the U direction. Information→ Spline provides the same spline specific information as Information→ Object. Information→ Object provides basic object information (layer, color, etc.) plus some spline specific information such as degree, number of poles, number of segments, number of each continuity type of knot points, and the spline’s polynomial/rational status. You can use the Information options described below if you want a more comprehensive analysis of your spline. The degree of a single segment curve is dependent on the number of its specified points. The Curve Degree option is not available if you make the curve type Single Segment. We do not recommend that you use a degree of one (1), since this produces curves with corners that may not work in downstream applications. Use the default degree of three (3) unless you have some good reason for doing otherwise. You should use lower degree curves whenever possible (3, 4, 5). There are four creation methods for splines: Causes the spline to gravitate towards each data point (that is, pole. In this section, the terms B-spline and spline are used interchangeably. All splines created in NX are Non Uniform Rational B-splines (NURBS). Creating lower degree curves results in faster performance during subsequent operations such as machining, display, etc. You can create splines using one of several methods. Higher degree curves are more likely to contain undesirable oscillations, and they reduce the chance of transferring data to other systems which may not support them. However, we recommend the use of cubics (a degree of 3) when creating splines. Lower degree curves are more pliable, and tend to follow their poles much more closely.Īs explained above, the degree of a NX spline must be between 1 and 24. Millumin is born in 2010 : after working on a Iduun show during months, Philippe did not feel to have the right tool to achieve its vision. For this reason, you cannot have a spline with less points than the degree.Ī higher degree curve is stiffer in the sense that you have to move its poles a long way to produce any appreciable change in the shape of the curve. After spending some years working with live video, Bart and Philippe formed the Iduun collective in 2008, to create new kind of shows and interactive installations. The degree is generally one less than the number of points in a spline segment. Every spline has a degree – a mathematical concept referring to the degree of the polynomial that defines the curve.
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